Answer:
A. 25 °C, 30 °C, 35 °C, 40 °C, 45 °C
Explanation:
Each enzyme has a temperature at which it works best. In humans and many animals, that temperature is around body temperature (37 °C or 98.6 °F). Most enzymes are denatured and work poorly at 40 °C (104 °F).
That automatically eliminates Option B.
I would pick a temperature close to 37 °C (98.6 °F) and temperatures at intervals above and below that.
Option D is wrong because it includes no temperatures above body temperature.
Option C is wrong, because it includes temperatures of 45 °C and 55 °C, at which the enzymes will be denatured.
That leaves Option A as the best answer. It includes only one temperature above 40 °C.
C: Exposing the plant to a higher light intensity
Observation designed to minimize the effects of variables other than the independent variable.
Sycamore trees (Platanus occidentalis) make handsome shade trees for large landscapes.

Answer:
Correct answer is ''c'' Emergency Medical Dispatchers
Explanation:
A 911 emergency medical dispatcher is a professional communicator who is trained to gather information related to medical emergencies, they must provide assistance and instructions by voice, prior to the arrival of the (EMS) regularly they use a series of key questions, pre-arrival instructions, and dispatch priorities to be used in the processing of EMS calls.